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WHAT ARE DIFFERENT GRADES OF CEMENT


Hello Every one. In today blog we will learn about WHAT ARE THE DIFFERENT GRADES OF CEMENT. We hear about the grades of concrete but what are the grades of cement. so in today blog we will discuss it. So lets start.

WHAT ARE DIFFERENT GRADES OF CEMENT


Prior to 1987, there was only one grade of Ordinary Portland cement which was governed by IS 269-1976. After 1987 higher grade cements were introduced. The ordinary Portland cement was classified into three grades namely 33 grade, 43 grade, 53 grade depending upon the strength of cement at 28 days when tested as per IS 4031-1988. If the 28-day strength is not less than 33 N/mm2, it is called 33 grade cement. If the 28-day strength is not less than 43 N/mm2, it is called 43 grade cement. If the 28-day strength is not less than 53 N/mm2, it is called 53 grade cement. But the actual strength obtained by the cement at the factory is much higher than BIS specification.

Below table shows the Compressive strength different grade of the cement.





The Compressive strength of Ordinary Portland cement increase with time. For example, From the above table you will notice that 33 grade cement acquire a Compressive strength of 16 N/mm2 at 3 days, 22 N/mm2 at 7 days, 33 N/mm2 at 28 days.

I hope that this article will help you to understand about DIFFERENT GRADES OF CEMENT.

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